PORTLAND, Ore. (AP) -- The same Oregon court that slapped Big Tobacco with a huge punitive damages award has handed the industry a victory by rejecting a class-action lawsuit for medical monitoring costs.

The Oregon Supreme Court ruled unanimously Thursday that smokers must show actual harm to make a negligence claim against cigarette manufacturers -- not the mere possibility of harm in the future.

A woman had sued on behalf of 400,000 Oregonians, claiming the companies "knew or should have known that their cigarettes contained toxic and hazardous substances likely to cause lung cancer."